DA Devalos asks Allison and Det. Scanlon to come in to work on a Sunday when siblings Brooke and Dylan Hoyt ask him for help in locating their mother, an old friend of his. As it happens, Allison had a nightmare the previous night where Brooke urges little Marie to shoot Allison and Joe while they're asleep in their bed. As they investigate, they find the brother and sister have had a tumultuous relationship over the years. Allison's ongoing dreams reveal a case of deception. At home, Joe's sister Sarah shows up at his front door after her marriage has broken down. Allison gets advice from the spirit of Joe's father on how to deal with her. Ariel asks her parents if she can go on a skiing trip with a classmate - whose 18 year-old brother will also be there.
—garykmcd